Tile supporting nose bracket for refractory furnace arches



oct. 18, 195s s. H. ANYON 2,720,850

TILE SUPPORTING NOSE BRACKET FOR REFRACTORY FURNACE ARCHES ,jlargonINVENTOH ATTORNEYS Oct. 18, 1955 s. H. LANYON 2,720,850

TILE SUPPORTING NOSE BRACKET FOR REFRACTORY FURNACE ARCHES Filed July16, 1951 4 Sheets-Sheet 2 s; l5 N c) s Q v a N P- v Q D v/m 0)] Oct. 18,1955 s. HA LANYON 2,720,850

TILE SUPPORTING NOSE BRACKET FOR REFRACTORY FURNACE ARCHES Filed July1e, 1951 4 Sheets-Sheet 3 JjZLafgala INVENTCR BY Maw-v@ ATTORNEYS Oct.18, 1955 s. H. LANYON 2,720,850

TILE SUPPORTING NOSE BRACKET FOR REFRACTORY FURNACE ARCHES Filed July16, 1951 4 Sheets-Sheet 4 CIO INVENTOR,

ATTORNEYS United States Patent Otlce 2,720,850 Patented Oct. 18, 1955TEE SUPPORTING NOSE BRACKET FOR REFRACTORY FURNACE ARCHES Samuel H.Lanyon, San Francisco, Calif., assigner to Frank Groves Company, SanFrancisco, Calif.

Application July 16, 1951, Serial No. 236,882 2 Claims. (Cl. 11G-99)This invention relates to refractory arch construction. Moreparticularly, the invention has reference to suspended refractory archassemblies used as roofs of industrial furnaces.

In conventionally constructed refractory arch assemblies, certaindisadvantages exist which it is proposed to eliminate through thepresent invention. In such conventional assemblies, construction of arefractory arch proceeds with a slowness which is undesirable; thrustand loading pressures are excessive at various locations in the arch,stresses within the arch are created by thermal expansion; skilledworkers are required; replacement of individual parts is diicult andcostly; metal parts providing integrity to the assembly are too close tothe hot face thereof; and, quite commonly, resistance to gas leakage isnot developed to as high an extent as is desirable.

The broad object of the present invention is to provide a refractoryarch construction in which these disadvantages will be eliminated ormaterially reduced.

It is proposed to meet this object of the invention by provision of anassembly including a novelly formed tile-supporting bracket adapted foruse at selected locations and capable of providing a base for either adroppednose or flat arch assembly as desired, and by the furtherprovision of novelly formed tiles capable of use in combination withsaid brackets to complete construction of the arch, the tiles being soformed as not to require the use of right and left hand units, and beingso formed, additionally as to be capable of being laid in a gas-tight,thrustless arrangement.

With the foregoing and other objects in View which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combination of parts, hereinafter more fully describedand pointed out in the claims, it being understood that changes may bemade in the construction and arrangement of parts Without departing fromthe spirit of the invention as claimed.

Referring to the drawings:

Figure 1 is a longitudinal section through a iiat arch assembly formedin accordance with the present invention.

Fig. 2 is a fragmentary transverse section taken on line 2-2 of Fig. 1.

Fig. 3 is an end elevation as seen from line 3 3 of Fig. l.

Fig. 4 is a longitudinal section through a dropped-nose arch assembly,an alternative angle to which the arch can be formed being illustratedin chain-dotted lines A.

Fig. 5 is a side elevation of the tile supporting bracket.

Fig. 6 is a top plan view of said bracket.

Fig. 7 is an end elevation of the bracket as viewed from the left ofFig. 5.

Figures 8 and 9 are respectively a side and a front elevation of arefractory block such as is used in the droppednose arch of Figures land 4.

Figures l0 and 1l are respectively a side and a front elevation of athrust block such as is used in the arch constructions of Figure l.

Figures l2 and 13 are a side and a front elevation of a radial blocksuch as is used in the arch constructions of Figures l and 4.

Referring to the drawings in detail, in Figs. 5 through 7 I haveillustrated the tile supporting bracket. This is a metal casting and isformed at its upper end with a horizontal shelf 1, one end of which iswidened as at 2. Upstanding from the other end of the shelf is thevertical attaching iiange 3 strengthened by a gusset 4 extending betweensaid flange and the shelf. Spaced openings 5, adapted to receive boltsof equivalent fastening means, are formed in the attaching flange.

Rigid with the intermediate portion of the shelf 1 and extendeddownwardly therefrom is the upper portion 6 of a longitudinal rib havingan elongated, straight tail portion 7 extending obliquely to andprojecting a substantial distance beyond the rear end of the shelf 1,the rear or inner end of the shelf being that end on which is providedthe attaching ange 3.

Spaced below the inner end of the shelf and extending longitudinally ofthe shelf, is a tongue 8. This is integral with the rib and isreinforced by a strengthening web 9 extended between said tongue and thebottom face of the shelf.

Depending from the rib throughout the length of the rib, and disposedupon the longitudinal center line of the rib, is a iin 14B. Upstandingfrom the rib and also eX- tended along the longitudinal center line ofthe rib is a back iin 11 integral intermediate its ends with ahorizontal lower attaching flange 12 having spaced openings 13.

I provide means spaced longitudinally of the bottom fin 10 adapted tosupport, at either or both sides of the bracket, end portions of tilesupport rods to be described hereinafter. In the present form of theinvention, said means constitutes rib members 14, 15, 16, 17 and 18.These are formed on both sides of the iin 10, being integral with therib tail portion 7 at their inner ends, and being extended outwardlyfrom said tail portion toward the bottom edge of the iin 10. At theirouter ends, the respective rib members are of hook-like formation,deiining bearing pockets for the ends of said tile supporting rods.

The rib member 14, as readily seen from Fig. 5, extends horizontallyfrom the longitudinal rib, while the rib member 1S extends downwardlyand obliquely from the longitudinal rib. Rib members 16 and 17 extendvertlcally from the longitudinal rib, while rib member 18 constitutes anextension of the rear end of the longitudinal rib.

As a result, it may be noted that the bearing pockets are so arrangedrelative to each other as to be disposed in a horizontal alignment atthe tail portion of the bracket (see the rib members 17 and 18). Thishorizontal series of bearing pockets merges into a curvilinear series atthe head portion of the bracket (pockets 14, 15 and 16).

Referring to Figs. 12 and 13, there is here illustrated one of the archtiles used with the above-described bracket. These may be termed radialtiles or blocks. Each of these is of tapered configuration when viewedin side elevation as in Fig. 12, and has a convex (as shown) or circularbottom face, which may be termed the hot face of the block when saidblocks are mounted in a refractory arch such as shown in Fig. l or inFig. 4. In this connection, the converging faces of the radial blocksare at angles of approximately 33 degrees to each other, for a reason tobe made apparent hereinafter.

At their upper ends, the radial blocks 19 are formed with reduced upperextensions 20 formed with openings the body 30 of the block 21, theopenings 21 being preferably formed noncircularly, so as to allowlatitude for limited transverse movement of the tile supporting rods.

Y The provision of the reduced upper extensions denes side shouldersV22, and these are curved circumferentially from the apex of the angleenclosing the con-j verging faces'of the blocks. l

Another form of block illustrated, and used in the irnproved assembly,is a thrust block 23 illustrated in Figs. 10 and 11. This block has oneface 24 inclined from the vertical and adapted to contact an adjacentradial block `in the manner illustrated in Fig. 1. The thrust blockshown also has a partially curved bottom face 2S.

Opposite the inclined face 24 is provided a Vvertical face `'26. At theupper end of the block, the ,block is reduced as at 27, defininghorizontal shoulders 28. A transverse groove 29,V for a purpose to bemade'apparent, is formed in the vertical face 26, slightly below theshoulders 28.

A t the reduced upper portion 27 of the thrust block is provided a pairof spaced openings'30 which, like the opening 21 of the vradial block,are of non-circular formation. In ,both blocks, the openings are soformed as to eliminate any sharp corners therein, it having been foundthat this minimizes the possibility of cracking due to mechanical orthermal stresses existing during manufacture or service.

In Figs. 8 and 9 I have illustrated a tile shape in which is ofrectangular, flat-faced configuration, said rectangular body beingformed with the upper extension 31Y of reduced width and may have oneend obliquely cut away as at 32. A groove 33 extends fully around theblock, at different heights at the base of the reduced upper extension.

VA plurality of perforations 34 and 35 respectively isizprovided in theblock of Fig. 8, the perforation 34 being of slot-like appearance, andthe perforations 375 being soformed as to receive tile supporting rodswhile allowing a limited amount of lateral play in said rods.

The bracketwhichhas been illustrated and described and the Vseveraltiles of blocks, are capable of assembly in various arrangements, toproduce refractory arches of desired design; One such arrangement isYillustrated in Fig. 1r This arrangement shows a flatrefractory archhaving. a radial nose. The blocks and bracket are assembled in thisinstance between masonry supporting walls, curtain wall 36 and frontwall 37 respectively. Supported immediately below the wall 36 is aconventional suspension beam, 38. Other beams 39 and 40 are spaced from.and extend parallel to the beam 33; 36, 39 and 40 are adequatelysupported by outside means.V

, A. plurality of transverse supporti-ng members 41 may heaforme'd fromangle iron material, as seen in Fig. 2, and'ha've their ends supportedupon the spaced beams. is no necessity of the ends of thel cross members41 being welded or otherwise rigidly secured to' the'supporting beams',.and they may simply rest thereupon, withoutdetracting from theefficiency, strength or immobility of the completed assembly.

At spaced intervals, supporting hooks designed to preveut angles 41-overturning? are suspended from the cross members 41, said hooks' havinghook Vends 42 at their upper ends, and having angular bodies 43 asseenin Fig', VHook` ends? are also formed at the lower ends of; the supporthooks, these engaging the medial portions of. approximatelysemi-circular bridles 44, of heat resist iugm'eta'l', the' lower ends ofwhich are formedv as hooks 45 support' g each ro'd 46 which passesthrough the perforations'of all the hat-faced or rectangular blocks 39which constitute an independently arch unit'.

Covering, the blocks 30 is insulation 47' of any desiredtyp'e, andsealing the joints of adjacent units assembled' of. blocks 30 a-gainstgas leakage are asbestos' ropes 48 disposed only inthe inter-unit groove33 of the blocks.

Inuasrsembly of. a. at refractory arch. such as seen in 1,. the rststepwould be `to mount the brackets 4 upon the supporting beam 38. Wideflange beams are preferred; but I-beams, channel, angle, T-beams, singlein multiple or combined, may Vbe used if desired. A plurality ofbrackets formed as illustrated in Fig. 5, is mounted upon said beam, atintervals spaced longitudinally of the beam. The brackets are secured tothe beam by means of bolts 49 passing through the beam and through theopeningsl 5 of the top attaching ange of each bracket.

When so secured to the beam, the bracket will have its tongue 8supported upon the bottom flange of thev beam as readily seen in Figl. Y

If found desirable to rigidify the several brackets in relation to eachother, a spacer bar 50 (or angle) may be provided, overlying the tailportions of the brackets, and secured to the several brackets by meansof bolts passed through the spacer bar and through the openings 13 ofthe bottom attaching flanges 12 of the brackets.V

This spacer bar 50 may be supported by attachment to bea'r'n 38.

After the brackets have been secured to the beam in this manner, thethrust blocks 23 are lput into place. The thrust blocks are suspendedfrom and are fixed in position by the insertion of rods 51 through theperforations 3i) of the thrust blocks. The thrust blocks, when strungupon the rods S1, are cemented together in twotile units which willassemblefwithin the center-to-center dimension of the adjacent brackets,with'the ends of the' supporting rods 51 being received in the pocketsof the rib members 17 and 18 of the respective brackets. Cement, orresilient expansion joints,- are provided at the vertical joints at thecenter of the brackets.

The radial blocks are new assembled to the brackets.

As a first step, the radial blocks are pre-cemented -re' versed inpairs, to make up supporting rod 51 is inserted through the perforationsof the units. The lowermost yradial bleek units are first mounted uponthe braeketsgthese' being the radial units' adjacent to the thrust blockunits 23 and contacting the inclined edges 24 of said thrust blocks'.The ends of the single support .rod 51 of the lowe'r'most series ofradial blocks are positioned in the pockets of the rib members 16.Higher series of radial blocks are similarly positioned in the ribmembers r15 and 14 re' spectively. Y

A wedge block 53, of a conventional fire brick shape; is positioned uponthe uppermost series of radial blocks; underv the top shelf of thebracket. Other lire bricks 52 are supported upon the top shelves of thebrackets; lling the' space between said top vshelves and the bottom ofthe masonry 36Y carried orr support 38'.

Considering the relativev formation Vand arrangement of the radialblocks and thrust blocks when mounted inV position, it is believedappropriate to note Vthat theconventio'nal wedge brick 53 has ahorizontal top face, and has an included ang-le" of approximately 6'degrees'L and 2()minutes. As previously noted herein, each radial blockhas an included Vangle of 33 degrees. Therefore, theV radial center lineof the lowermost radi'al block which passes through its center ofgravity, as -block isY symmetrical on this plane, is l degree and 1()minutes This assures a gravity across the joint between and the thrustblock 2'3 adjacenttnereto. As a result, the assembly of three radialblocks and the wedge brick above' will, by their unbalanced weight,producea lforce tending' to cause the' thrust blqks fo pivotA on thatsup*- porting rouv 5r passing through the right hand pei-feralfio'n' 3sf the thrust 1510er wln the trusf broer is viewed as in Fig. 1'. Suchrotation is stopped by the vertical immovabil'ity of' rod 5.1 in lefthand perfora-V tion 30. Y

In other existing. similar assemblies this force is either absorbed bythe blocks of the adjacent-flat portion of the arch assembly, or by ananchored metal thrust a unit, after which asi-ngleV pressure due to thelowest radial' l'jlotkV plate, which must necessarily extend close tothe hot face of the tile. Such thrust plates are soon burned out and areknown to be highly undesirable.

In the present assembly, however, the thrust blocks, by their weight,resist displacement in such a way as to reduce the gravity load on thetail end of the brackets at pockets 16.

In Fig. 4, I have illustrated a dropped-nose refractory arch assembledby means of my universal bracket and specially shaped blocks.

In this instance a masonry curtain wall 54 is illustrated, below whichis ixedly mounted in any suitable manner the supporting beam 55. Aplurality of fire bricks 52 are disposed between the top shelves of thebrackets that are secured to the supporting beam, and fill the spacebetween said shelves and the curtain wall.

In this instance another form of thrust block is used, this beingdesignated 56. Essentially, this form of thrust block is the same as thethrust block illustrated in Figs. and 11, except that instead of avertical face 26, another inclined face is provided, to give an upwardinclination to the series of blocks extending from contact with thethrust block.

In any event, the thrust blocks 56 are strung upon supporting rods, andsecured to the universal brackets by positioning of the rod ends in thepockets of the rib members 17 and 18 of the brackets. Radial blocks 19are assembled in the manner described above, and suspended from andbetween the universal brackets, after which a wedge iire brick 53 is putin place.

The pre-assembled units of at faced rectangular blocks 30 are nowsuspended in proper position, and provide an arch face extendingupwardly at an angle of degrees in the present instance. Through theprovision of a different type of thrust block 56, the angle of said archface can be lowered as shown by chain-dotted lines A, or any otherangle. The uppermost blocks 30 are cut away as at 57, at the point ofintersection with the horizontal portion of the arch.

With reference to the suspension of the blocks 30 in proper position,support hooks 58, 59, 60 and 61 of different selected lengths are used,the upper ends thereof engaging over spaced cross members 62 supportedat opposite ends upon supporting beams 63. The supporting beams 63 canbe rigidly connected by braces 64, angle clips 65 being used to effectthe connections between the beams and cross braces.

Supported upon the beams 63 are angle irons porting the fuel chute 67and 68.

In both assemblies, the blocks 30 are assembled in multi-block units offour blocks each, the blocks of each unit being pre-cemented withair-setting refractory cement. Thereafter, they are handled andinstalled as multi-block units. However, adjacent units are dry-laid,that is they are not cemented together. This defines open jointsinter-unit crossing through the length and breadth of the assembly.These open interunit joints are filled with strands of asbestos ropewhich are tamped into the continuous grooves defined by the side-by-sideblock arrangement in each of the units.

It is believed worthy of note that the grooves in the block ends areslightly higher than the grooves in the sides, thus to secure gas-tightjoints throughout, including 66 supthe points where the asbestos ropescross at right angles. The ropes are a substantial distance away fromthe hot faces of the blocks, and therefore will not deteriorate frombeing exposed to destructive temperatures.

All pre-cemented units, as previously noted, are installed without theuse of cement or plastic joint filler. Rather, they are merely suspendedin aligned rows, and the transverse and longitudinal joints between theunits caulked with asbestos rope. The possibility of spelled blockswhich might otherwise rise due to expansion pressure is thus obviated,since the joints between units include an open space extending fullyaround each unit below the asbestos caulking which is resilient.

Another important characteristic of the invention is also believedworthy of note, in that any unit can be removed or replaced quickly andat minimum expense for labor and parts, and also without the use ofmortar or any other wet ller. Since the units are not interlocked ortongue-and-grooved, they do not depend upon each other for support andany unit can therefore be removed individually and replaced withoutcutting. 'Ihis replacement of units can be accomplished by utilizingunskilled labor working from the outside of the furnace, even while thefurnace is too hot to enter.

Having thus described the invention, what is claimed 1s:

l. A nose bracket for supporting refractory roofs comprising a one-piececasting including a main fin, ribs extending laterally and disposedlongitudinally of the main iin, a back iin mounted on and above saidribs, a horizontal top shelf formed integral with one end of said mainiin, said top shelf extending a substantial distance forwardly beyondthe front edge of said main fin and rearwardly over a portion of saidmain iin, providing a support, rod supports extending from the rib atone side of the main iin, terminating in hooks disposed adjacent to theedge of the main fin, providing a series of spaced pockets for receivingtile supporting rods.

2. A nose bracket for supporting refractory roofs comprising a wide atbody having side faces disposed vertically, lateral ribs extendinglongitudinally of the side faces of the body, a wide horizontal shelfformed integral with one end of said body, spaced rod supporting ribsextending laterally from the side faces of the body, upwardly curvedhooks formed at the ends of said supporting ribs adjacent to one edge ofsaid body in which refractory brick supporting rods are adapted to bepositioned for supporting refractory bricks mounted on said rods.

References Cited in the iile of this patent UNITED STATES PATENTS1,541,441 Stimmel June 9, 1925 1,544,869 Stevens July 7, 1925 1,612,412Bigelow Dec. 28, 1926 1,690,088 Burnet Oct. 30, 1928 1,750,355 RagoucyMar. 11, 1930 1,760,121 Dobie May 27, 1930 1,764,707 Abbott June 17,1930 1,806,747 Dobie May 26, 1931 1,806,809 Lanyon May 26, 19312,132,517 Reintjes Oct. 11, 1938

